Date / Period

Station Values

Introduction

Welcome to eoApp, a free visualiser of EOMAP's water quality products covering
selected areas around the globe. You can find and request data for all continents and various spatial or temporal sampling resolutions.

Using its proprietary science, EOMAP is now publishing continuously harmonized products. We publish products few hours after record time
in client requested regions or provide information back in time as far as 1984. If you are interested in purchasing or subscribing to
any of these products, please visit our online store or contact the dedicated service
team via info@eomap.com.

What this eoApp shows

Turbidity: a measure of the degree to which light is being backscattered by particles in the water. Tracking changes
in turbidity is useful when for example monitoring sediment plumes from dredging and dumping activities. The measurement unit is
Earth Observation Turbidity Unit (ETU) and directly related to backscattering of particles, very similar in magnitude to Nephelometric
and Formazine Turbidity Units (NTU and FTU). It is linearly related to Total Suspended Matter (TSM) at low to moderate turbidity values.

Chlorophyll-a: Chlorophyll-a is an essential pigment included in phytoplankton cells and therefore a measure of phytoplankton.
The displayed Chlorophyll-a CHL is calculated from total scattering and total organic absorption of water constituents. Unit is [µg/l]

Please read the information booklet and validation report to understand the validity range of the products. Products are generated independent
on any form of ground truth data, and inter-comparable over the various resolutions provided. The Chlorophyll and HAB indicator may have site-specific
limitations e.g. for extremely humid, calcareous, or ferruginous waters, and can be improved with local adaptations. General restrictions are caused
by clouds, optical shallow waters, or undetected artefacts from e.g. cloud shadows.

How to use this eoApp

On the right hand side of the top bar, you will find the basic map tools for interacting with the map,
such as panning, zooming, and placing a virtual measuring station.

In the blue panel on the right hand side, you can essentially do following things:

Select which of the available regions you wish to explore.

Select which of the three parameters you wish to visualise: turbidity, chlorophyll-a or hab indicator.

Select for which date or time period you wish to see your selected parameter. Currently you can see three options:

Daily: displays the parameter values as raster data derived from satellite data according to the sensor
specifications, e.g. using Landsat images each pixel has resolution of 30mx30m. Clouds and pixels with bad quality
are not visible

Daily Mean (D'Mean)
for 30m resolution: mean parameter value of all pixels of a whole waterbody based on OpenStreetMap polygons.
Pixels for a minimum of 10% of the waterbody area must be available.
for 500m resolution: pixelwise mean value of all pixels of one day.

Moving Mean (M'Mean): pixelwise mean of all pixels of the previous 7 days.

Seasonal: average pixelwise parameter values for a fixed time period, e.g. May-September 2014, using all available data

See the parameter value and geographic coordinates for your virtual measuring station.

Generate a time series plot of the selected parameter value at your virtual measuring station. Please wait few seconds after placing
the pin for the virtual measuring station, as the time series data are generated on the fly from the available data layers.

FAQ

Q: I am interested in a location outside the polygon areas that you feature here.
How can I view water quality maps for my location?
A: Please send us an email indicating the area you are interested in. If we get enough requests for the same area,
we could add it to this free visualiser. Otherwise, we are happy to give you a no obligations quote for how we could
meet your specific needs.

Q: We are an organisation that would like to subscribe to your data feed for selected water quality products over
our own areas of interest. Can you provide us with our own eoApp for our project?
A: Absolutely. We would set you up with your own secure eoApp, covering your area(s) of interest and we can
also modify some of the functionality to suit your needs.

Q: Can I get higher resolution data or aggregated information as well?
A: Yes, we also offer in some instances even a 2m product or up to daily sampling. Just send us an email with your requested
area or visit our online store at www.eomap.com/store

About EOMAP

EOMAP is the leading commercial provider in satellite-derived information on aquatic systems, acting worldwide as
an operational mapping service provider for the offshore industry and environmental agencies. Pioneering in the field of commercial,
satellite-derived high resolution water quality and bathymetry, EOMAP solutions rely on standardized physical models
which are independent of scale, sensor type, and geographic location. Key services include satellite derived
bathymetry surveys, seafloor mapping and operational water quality monitoring. EOMAP value adding services can
furthermore be applied at regional through to intercontinental scales, providing continuous and long term environmental
information through integrating multiple satellite resources.

Disclaimer

Earth observation data are in general recorded under changing environmental conditions. EOMAP value adding
software corrects for most relevant environmental conditions. However, with respect to the physical nature of
the remote sensing method the achievable product quality can differ due to varying observation angles, varying
atmospheric(-), surface(-) and in-water conditions or changing sensor raw data quality with each scene.
Therefore, EOMAP cannot take any responsibility caused by the usage and interpretation of the remote sensing
products. Of course, EOMAP will undertake all possible efforts to assure a constant product quality.

Disclaimer

Earth observation data are in general recorded under changing environmental conditions. EOMAP value adding
software corrects for most relevant environmental conditions. However, with respect to the physical nature of
the remote sensing method the achievable product quality can differ due to varying observation angles, varying
atmospheric(-), surface(-) and in-water conditions or changing sensor raw data quality with each scene.
Therefore, EOMAP cannot take any responsibility caused by the usage and interpretation of the remote sensing
products. Of course, EOMAP will undertake all possible efforts to assure a constant product quality.

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